On 01/05/2019 17.12, Joakim Tjernlund wrote: > On Wed, 2019-05-01 at 09:29 +0000, Rasmus Villemoes wrote: >> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. >> >> >> Reading table 4-30, and its footnotes, of the QUICC Engine Block >> Reference Manual shows that the set of snum _values_ is not >> necessarily just a function of the _number_ of snums, as given in the >> fsl,qe-num-snums property. >> >> As an alternative, to make it easier to add support for other variants >> of the QUICC engine IP, this introduces a new binding fsl,qe-snums, >> which automatically encodes both the number of snums and the actual >> values to use. >> >> For example, for the MPC8309, one would specify the property as >> >> fsl,qe-snums = /bits/ 8 < >> 0x88 0x89 0x98 0x99 0xa8 0xa9 0xb8 0xb9 >> 0xc8 0xc9 0xd8 0xd9 0xe8 0xe9>; > > I think you need add this example to the qe.txt doc itselft. Sure, can do. > BTW, what is /bits/ ? That indicates that the numbers should be stored as an array of u8, and not as by default an array of (big-endian) 32-bit numbers. See https://git.kernel.org/pub/scm/utils/dtc/dtc.git/tree/Documentation/dts-format.txt#n46 This is already used in some bindings and existing .dts (e.g. hwmon/aspeed-pwm-tacho.txt, but git grep shows many more). Rasmus
